European entering very pleasant Italian city (6)
I believe the answer is:
venice
'italian city' is the definition.
(I've seen this before)
'european entering very pleasant' is the wordplay.
'european' becomes 'e' (abbreviation e.g. EU).
'entering' indicates putting letters inside.
'very' becomes 'v' (abbreviation).
'pleasant' becomes 'nice' ('nice' is associated in meaning with 'pleasant').
'v'+'nice'='vnice'
'e' inserted within 'vnice' is 'VENICE'.
(Other definitions for venice that I've seen before include "Italian city with Bridge of Sighs" , "North Italian port" , "major tourist attraction" , "City of canals instead of streets" , "Old republic" .)